What are your sinuses? air chambers in your head
located in your lungs
holes in your ears
in your voice box

How will your health most likely be affected if you follow the recommended guidelines for sleep, rest, and physical activty

Victoria enjoys laughing with her friends as they walk around the track after school which best describes her heart rate during this activity

Viruses use the host's machinery to make copies of themselves. however, some human viruses require a type of replication that humans do not normally have. for example, humans normally do not have the ability to convert rna into dna. how can these types of viruses infect humans, when human cells cannot perform a particular role that the virus requires? a) the virus causes mutations in the human cells, resulting in the formation of new enzymes that are capable of performing these roles. b) the viral genome codes for specialized enzymes not in the host. c) the virus infects only those cells and species that can perform all the replication roles necessary. d) viruses can stay in a quiescent state until the host cell evolves this ability.